第三篇：Spring Boot整合Servlet

一、Springboot整合Servlet

第一种方案：

1、创建一个自定义的servlet，继承HttpServlet添加@WebServlet注解
以前ssm中的web.xml配置文件中的servlet>

<servlet><servlet-name>FirstServlet</servlet-name><servlet-class>com.gblfy.servlet.FirstServlet</servlet-class>
</servlet><servlet-mapping><servlet-name>FirstServlet</servlet-name><url-patten>/first</url-patten>
</servlet-mapping>

Spring Boot 实现方式

/*** @author gblfy* @ClassNme FirstServlet* @Description SpringBoot整合Servlet 方式1* @Date 2019/2/19 14:49* @version1.0*/
@WebServlet(name = "FirstServlet",urlPatterns = "/first")
public class FirstServlet extends HttpServlet {@Overrideprotected void doGet(HttpServletRequest req, HttpServletResponse resp) throws ServletException, IOException {}
}

2、在启动类中添加注解

/**- SpringBoot整合Servlet 方式1*/
@SpringBootApplication
@ServletComponentScan//在springboot启动时会扫描@WebServlet注解，并将该类实例化
public class Application {public static void main(String[] args) {SpringApplication.run(Application.class, args);}
}

3、为了便于显示，在servlet中添加输出语句

  @Overrideprotected void doGet(HttpServletRequest req, HttpServletResponse resp) throws ServletException, IOException {System.out.println("FirstServlet启动........");}

4、浏览器访问：http://localhost:8080/first
5、查看控制台

第二种方案：

通过方法完成servlet组建的注册
1、编写一个自定义servlet
- 以前ssm中的web.xml配置文件中的servlet

<servlet><servlet-name>FirstServlet</servlet-name><servlet-class>com.gblfy.servlet.FirstServlet</servlet-class>
</servlet><servlet-mapping><servlet-name>FirstServlet</servlet-name><url-patten>/first</url-patten>
</servlet-mapping>

Spring Boot 实现方式

/*** @author gblfy* @ClassNme FirstServlet* @Description SpringBoot整合Servlet 方式2* @Date 2019/2/19 14:49* @version1.0*/
public class SecondServlet extends HttpServlet {@Overrideprotected void doGet(HttpServletRequest req, HttpServletResponse resp) throws ServletException, IOException {System.out.println("SecondServlet启动........");}
}

2、编写启动类，添加一个方法，通过@Bean注解注入bean

/*** SpringBoot整合Servlet 方式2*/
@SpringBootApplication
@ServletComponentScan
public class SpringBootChapter3Application2 {public static void main(String[] args) {SpringApplication.run(SpringBootChapter3Application2.class, args);}@Beanpublic ServletRegistrationBean getServletRegistrationBean(){ServletRegistrationBean bean =new ServletRegistrationBean(new SecondServlet());bean.addUrlMappings("/second");return bean;}
}